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Full text of "Alaskan glacier studies of the National Geographic Society in the Yakutat Bay, Prince William Sound and lower Copper River regions"

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172                                 ALASKAN GLACIER STUDIES
TABTILAB SUMMARY OF ADVANCES SINCE 1899 EABTEQTJAKES
Year of Advance	Name of Glacier	Length of Glacier
After 1895 and before 1905 Between 1899 and 1901	Galiano Miller i	2 or 3 miles 3 or 4 miles
	a	
1905-1906 1906-1907	Haenke Atrevida Variegated Marvine Hidden 3	6 or 7 miles Smiles 10 miles 10 miles (excluding expanded lobe in Malaspina) 16-17 miles
	4	
1909	Lucia 6	17-18 miles
1910	Nunatak	SO miles
 Perhaps Hendrickson, Rasmussen, McCarty, and Blossom Island Glaciers, each 1 to 2j miles long. * Perhaps Turner between 1890 and 1901, and Hubbard between 1899 and 1901, and Hubbard between. 1901 and 1905.
i Perhaps Turner between 1906 and 1909. *Northwestern arm of Hubbard. i South arm of Hubbard.
Generalizing the facts observed in the various glaciers, during our five seasons of observation, it may be said that certain glaciers, nine certainly and perhaps six others,, present evidence of an abrupt and absolute transformation within a short time, and then,, . in every case, a sudden return to their former condition. Among the glaciers that have-advanced there is a general agreement between size of the glacier and time of the advance,, as shown in the tabular statement above. The Galiano, which advanced before 1905,. is one of the smallest visible glaciers of the region and Miller Glacier, which advanced between 1899 and 1901, is little if any larger; the four that advanced in 1905-6 are larger than the Galiano and Miller, though not among the largest Yakutat Bay glaciers; the Hidden Glacier, which advanced later, probably in 1907, is still larger; the Lucia, which advanced in 1909, is larger than the Hidden; and the Nunatak, which advanced in 1910, is larger than the Lucia. The one apparent exception to this order of appearance of the advance is the Marvine-Malaspina Glacier, whose valley portion falls in its-proper place in order of size, if we may accept the map as correct. Two of the largest and most active glaciers (Turner and Hubbard) have had no notable advance, though there have been some fluctuations of their fronts, perhaps representing response to thrusts from shorter tributaries. For some of the smaller glaciers, we have no proof of an advance; but, in the case of some of the smaller of these, this may be due to our failure to recognize evidence of an advance that was completed before 1905; in other small gla-